WASHINGTON: More people may have been infected by the virus that causes bird flu than previously thought, and the number of deaths from H5N1 infection may also have been "overestimated," New York scientists conclude in a study.
The study, published in the journal Science, notes that the World Health Organisation (WHO) has documented fewer than 600 cases of H5N1 influenza A infection, also called avian infection in humans, reported China's Xinhua news agency.
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